The FieldTR transformer is ~1 mm higher than what the standard
permits. Due to that, the carrier board should have a cut out under
the FMC board (see e.g. the
SPEC board). While it is
possible to mount FMC-nanoFIP on a carrier without the cutout, it
may create undesired mechanical stress (see mounting FMC-nanoFIP on
SVEC
carrier).

The FMC standard says a mezzanine should provide an EEPROM, but due
to radiation tolerance requirements it is not desirable. There is a
footprint to mount an EEPROM, but it is not mounted by default.

Full specification is available here. You can also
refer to the user manual to learn
more about the mezzanine.